So much love, yet no mention of which lens or lenses you were using...

You are correct - lenses are critical. I used the Canon 24-105L and the new Sigma 35 f1.4 as walk arounds. I also have other L zooms and primes, but the two that I mentioned were the ones that I used over the past few days.

Also, was the 17-55 your primary lens on the 60D?

Yes, it was my walk around lens. (Great lens, by the way.)

The 60D is my only Canon body, but I'm considering the 6D because of my beautiful legacy lenses - 35, 50, 90, 135.